Grab



A. E. NORRIS GRAB Original Filed Sept. 9. 1921 3 Sheets-Sheet 1 L 177132631702".- 5 flzmonEiNownis,

M higs July 29, 1924. 1,503,333

A. E. NORRIS GRAB Original Filed Sent. 9. 1921 s sheets-sheet 2 lave-min? .iuly 29 1924.

A. E. NORRIS GRAB Original Filed Sent. 9. 1921 3 Sheets-Sheet 3 Patented July 29, 1924.

armor: E. Humane BBOOKLITKIE, massacnusnrrs.

GRAB.

original application filed septenibere, 1921, Serial in). 499,395. Divided and this application filed To all whom it may concern:

Be it known that I, ALMoN E. Norms, a citizen of the United States, and a resident of Brookline, in the county of Norfolk and State of Massachusetts, have invented an Improvement in Grabs, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings represent ing like parts. i

This invention aims to provide a novel and improved grab, having provision for the'replacement of the scoops, without the necessity of dismounting any parts of the operating mechanism, thereby permitting the user to make the replacement in the field, and without the necessity of sending the grab to the maker.

The invention will be best understood by reference to the following description, when taken in connection with the accompanying drawings of one specific embodiment thereof, while its scope will be more particularly pointed out in the appended claims.

In the drawings,

Fig. 1 is an end elevation of a grab exemplifying the invention, showing the same in its closed position; v

Fig. 2 is a side elevation of the grab as viewed from the right-hand side of Fig, 1;

Fig. 3 is a vertical, sectional view on line 3-3 of Fig. 1; and

Fig. 4 is a perspective view of the scoops and the frame, detached one from the other.

Referring to the drawings, and to the embodiment of the invention which is selected for exemplification, and having particular reference to Fig. 1, there is shown a grab having a pair of scoops 10 and 10, provided with jaws 12 and 12, the latter being suitably secured, as by rivets 14 and 14, to end plates 16 and 16. The plates at one end are united to those at the other by curved plates 18 and 18, in any usual manner.

Referring now to Fig. 4, the scoops 10 and 10" are provided, respectively, with frames designated generally by the numerals 20 and 20, and connecting portions 24 and 24, which in" the present example, for convenience of manufacture, are formed separately, and are suitably secured to the hinge pieces, as by sets of flush rivets 26 and 26 (Fig. 1). Each frame presents a generally U-shaped support for the upper margin .of its scoop on its sides, as well as on its ends.

May 23 1923. Serial 110.6%,892.

The frames are suitably secured'to their respective scoops by fastening elements received in perforations therein.- In the present example, the end plates and jaws are provided with sets of perforations 28 and 28', registering with corresponding perforations 30 and 30, provided in hinge pieces 22 and 22, and receiving bolts 32 and 82 (see Fig. 1), while the plates 18 and 18 are provided with perforations 34 and 34, register ing with corresponding perforations 36 and 36, in the connecting portions 24 and 24', respectively, and receiving bolts 38 and 38' (see Fig. 1).-

If at any time the scoops should become damaged and require replacement, this can be accomplished without dismounting any parts of the operating mechanism, by'simply removing the bolts, detaching the scoo s, and replacing them by newones'.

This can be done very easily in the field, and without the necessity of sending the grab to the maker.

In the present example, the hinge pieces of one scoop are pivoted by being connected to those of the other scoop by a hinge pin 40, best shown in Fig. 3, appropriately held in place therein as by nuts 42, threaded onto the ends thereof and conveniently held against accidental turning movement by bolts 44 (see 2), which extend through the nuts and through the hinge pin. The latter is preferably held against turning movement in one pair of hinges, herein the hinges 22, as by bolts 46, which extend through the hinge pin, as well as the bosses of the hinges,while on the other end, the hinge pin turns in the bosses of the other hinges 22.

The hinges are provided with suitable means for limiting the opening movement of the scoops, herein pockets 48 and 48, conveniently formed integrally therewith, and chambered to receive appropriate cushioning means, such as wooden blocks 50 and 50. Referring now to Fig. 1, the frames 20 and 20 are supported by suitable supporting means, herein pairs of links 52 and 52, to which they are pivotally connected as by pivot pins 54 and 54, received in pairs of ears 56 and 56, preferably formed as integral parts of the reinforcing bars or stifieners 24 and 24, respectively, as best shown in Fig. 4. The members of each pair of links converge toward their upper ends (see Figs. 2 and 3), where they are pivoted together by a pin 58, best shown in Fig. 1. The links 52 constitute a frame, and they are rigidly secured to each other, as by tiebolts 60 and 62, while the links are suitably spaced apart by several spacers, including spacers 64: and 66 (see Fig. 2).

In the absence of means to hold the grab closed, the jaws will gravitate to an open position, the opening movement being limited by the stops 50 and 50. Closing movement-of the grab is herein accomplished by appropriate closing means, such as a rope 68, a series of sheave wheels 70, 72 and 74:, and a closing lever 76. As the closing mechanism is not claimed herein, a further description thereof will be unnecessary. This application is a division of my pending application, filed September 9, 1921, Ser. No. 499,395, in which the closing and locking mechanism is claimed.

Having thus described one embodiment of the invention, but without limiting myself thereto. what I claim and desire by Letters Patent to secure is:

1. In a grab bucket, the combination of a shell, a unitary frame presenting a reinforcement for the upper margin of said shell at all sides thereof, and means by which said shell is secured to said frame but may be removed and replaced.

2. In a grab bucket, the combination of a shell comprising two scoops, a frame presenting two generally U-shaped supports for the upper mar ins of said scoops, respective ly, and means by which said supports are secured to said scoops, respectively, but may be removed therefrom at will.

i 3. In a grab bucket, the combination of a shell comprising two scoops having upper margins provided with perforations, a frame comprising two hinged parts presenting two generally U-shaped marginal portions pro vided with perforations, and fastening ele ments received in the perforations of said margins and of said portions and securing them together.

4. In a grab bucket, the combination of a shell comprising two scoops each presenting two ends and a side connecting them, two unitary frames each presenting two ends and a side connecting them, constituting reinforcements for said ends and side of one of said scoops, and means by which each frame is secured to its scoop at its said ends and side but may be removed and replaced.

5. In a grab bucket, the combination of a shell comprising two scoops each presenting two ends and a side connecting them, two unitary frames each presenting two ends and a side connecting them, constituting reinforcements for said ends and side of one of said scoops, each frame presenting hinge pieces and ears, means pivotally connecting the hinge pieces of each frame to the hinge pieces of the other frame, supporting means pivotally attached-to said ears, and means by which each frame is secured to its scoop but may be removed and replaced.

6. In a grab bucket, the combination of a shell comprising two scoops each presenting two ends and a side connecting them, two unitary frames each presenting two ends and a side connecting them constituting reinforcements for said ends and side of one of said scoops, each frame presenting hinge pieces and two sets of ears, means pivotally connecting the hinge pieces of each frame to the hinge pieces of the other frame, supporting means pivotally attached to said sets of ears, and means by which each frame is secured to its scoop but may be removed and replaced.

In testimony whereof, I have signed my name to this specification.

ALMON E. NORRIS. 

